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arXiv 2401.05014cs.CVcs.AI
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通过释放任务无关数据的潜力实现无源跨模态知识迁移

Source-Free Cross-Modal Knowledge Transfer by Unleashing the Potential of Task-Irrelevant Data

The Hong Kong University of Science and Technology(香港科技大学)

Jinjing Zhu, Yucheng Chen, Lin Wang

AI总结:

针对无源跨模态知识迁移,提出利用配对任务无关数据估计源分布的框架,通过模态桥接和知识迁移模块结合自监督伪标签,在三个数据集上达到SOTA。

摘要:

无源跨模态知识迁移是一项关键且具有挑战性的任务,旨在由于内存和隐私考虑而无法访问任务相关(TR)源数据的情况下,将知识从一种源模态(例如RGB)迁移到目标模态(例如深度或红外)。最近的一种尝试利用配对的任务无关(TI)数据,并直接匹配其中的特征以消除模态差距。然而,它忽略了一个关键线索,即配对的TI数据可用于有效估计源数据分布,并更好地促进向目标模态的知识迁移。为此,我们提出了一种新颖而简洁的框架,以释放配对TI数据的潜力,从而增强无源跨模态知识迁移。我们的工作由两个关键技术组件支撑。首先,为了更好地估计源数据分布,我们引入了任务无关数据引导的模态桥接(TGMB)模块。它基于配对的TI数据和可用源模型的指导,将目标模态数据(例如红外)转换为类源RGB图像,以缓解两个关键差距:1)配对TI数据之间的模态间差距;2)TI与TR目标数据之间的模态内差距。然后,我们提出了任务无关数据引导的知识迁移(TGKT)模块,该模块通过利用配对TI数据将知识从源模型迁移到目标模型。值得注意的是,由于TR目标数据标签的不可用性及其源模型预测的可靠性较低,我们的TGKT模型结合了自监督伪标签方法,使目标模型能够从其自身的预测中学习。大量实验表明,我们的方法在三个数据集(RGB到深度和RGB到红外)上实现了最先进的性能。

英文摘要:

Source-free cross-modal knowledge transfer is a crucial yet challenging task, which aims to transfer knowledge from one source modality (e.g., RGB) to the target modality (e.g., depth or infrared) with no access to the task-relevant (TR) source data due to memory and privacy concerns. A recent attempt leverages the paired task-irrelevant (TI) data and directly matches the features from them to eliminate the modality gap. However, it ignores a pivotal clue that the paired TI data could be utilized to effectively estimate the source data distribution and better facilitate knowledge transfer to the target modality. To this end, we propose a novel yet concise framework to unlock the potential of paired TI data for enhancing source-free cross-modal knowledge transfer. Our work is buttressed by two key technical components. Firstly, to better estimate the source data distribution, we introduce a Task-irrelevant data-Guided Modality Bridging (TGMB) module. It translates the target modality data (e.g., infrared) into the source-like RGB images based on paired TI data and the guidance of the available source model to alleviate two key gaps: 1) inter-modality gap between the paired TI data; 2) intra-modality gap between TI and TR target data. We then propose a Task-irrelevant data-Guided Knowledge Transfer (TGKT) module that transfers knowledge from the source model to the target model by leveraging the paired TI data. Notably, due to the unavailability of labels for the TR target data and its less reliable prediction from the source model, our TGKT model incorporates a self-supervised pseudo-labeling approach to enable the target model to learn from its predictions. Extensive experiments show that our method achieves state-of-the-art performance on three datasets (RGB-to-depth and RGB-to-infrared).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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